AC vs Level for tanking

[Splorf22]

So as all my forum stalkers know (you know who you are) I recently made an iksar warrior twink. I bought him some PL and now at 25 he's putzing around whacking things with a Staff of Battle and a full suit of Sebilite Scale armor (you have no idea how hard it was to get the stupid coat). Fun times.

I've never really paid attention to how tanking works as an enchanter, but now that I'm actually getting hit it seems a little weird. Let me take an example from a fight. Here is me getting hit by a carrion ghoul (22-24 or so).

[Sun Dec 04 09:53:43 2011] A carrion ghoul hits YOU for 17 points of damage.
[Sun Dec 04 09:53:43 2011] A carrion ghoul bashes YOU for 8 points of damage.
[Sun Dec 04 09:53:47 2011] A carrion ghoul tries to hit YOU, but misses!
[Sun Dec 04 09:53:50 2011] A carrion ghoul hits YOU for 19 points of damage.
[Sun Dec 04 09:53:51 2011] A carrion ghoul kicks YOU for 4 points of damage.
[Sun Dec 04 09:53:53 2011] A carrion ghoul hits YOU for 6 points of damage.
[Sun Dec 04 09:53:53 2011] A carrion ghoul hits YOU for 4 points of damage.
[Sun Dec 04 09:53:53 2011] a carrion ghoul was hit by non-melee for 9 points of damage.
[Sun Dec 04 09:53:54 2011] You tell your party, 'hooray facepull'
[Sun Dec 04 09:53:56 2011] A carrion ghoul hits YOU for 2 points of damage.
[Sun Dec 04 09:53:59 2011] A carrion ghoul hits YOU for 2 points of damage.
[Sun Dec 04 09:53:59 2011] A carrion ghoul tries to kick YOU, but misses!
[Sun Dec 04 09:54:02 2011] A carrion ghoul tries to hit YOU, but misses!
[Sun Dec 04 09:54:02 2011] A carrion ghoul hits YOU for 15 points of damage.
[Sun Dec 04 09:54:02 2011] a carrion ghoul was hit by non-melee for 9 points of damage.
[Sun Dec 04 09:54:05 2011] A carrion ghoul hits YOU for 8 points of damage.
[Sun Dec 04 09:54:07 2011] A carrion ghoul kicks YOU for 10 points of damage.
[Sun Dec 04 09:54:08 2011] A carrion ghoul hits YOU for 19 points of damage.
[Sun Dec 04 09:54:08 2011] A carrion ghoul hits YOU for 10 points of damage.
[Sun Dec 04 09:54:10 2011] A carrion ghoul hits YOU for 2 points of damage.
[Sun Dec 04 09:54:13 2011] A carrion ghoul tries to hit YOU, but misses!
[Sun Dec 04 09:54:13 2011] A carrion ghoul tries to hit YOU, but misses!
[Sun Dec 04 09:54:15 2011] A carrion ghoul kicks YOU for 2 points of damage.
[Sun Dec 04 09:54:16 2011] A carrion ghoul hits YOU for 2 points of damage.
[Sun Dec 04 09:54:19 2011] A carrion ghoul hits YOU for 2 points of damage.
[Sun Dec 04 09:54:19 2011] A carrion ghoul hits YOU for 2 points of damage.
[Sun Dec 04 09:54:19 2011] You have slain a carrion ghoul!

I was duoing with a 25 druid and had about 1150 HP and 680AC. In this case my gear worked pretty well - not a single max hit. Of course it didn't always go quite that well, but in general I would say when fighting blues I would get at most 20% max hits. On the other hand, here is me vs a yellow werebat (L28 I believe).

[Sun Dec 04 09:57:10 2011] A werebat hits YOU for 56 points of damage.
[Sun Dec 04 09:57:10 2011] A werebat kicks YOU for 10 points of damage.
[Sun Dec 04 09:57:13 2011] A werebat hits YOU for 28 points of damage.
[Sun Dec 04 09:57:13 2011] A werebat hits YOU for 14 points of damage.
[Sun Dec 04 09:57:16 2011] A werebat hits YOU for 56 points of damage.
[Sun Dec 04 09:57:18 2011] A werebat tries to kick YOU, but misses!
[Sun Dec 04 09:57:19 2011] A werebat tries to hit YOU, but misses!
[Sun Dec 04 09:57:22 2011] A werebat hits YOU for 23 points of damage.
[Sun Dec 04 09:57:22 2011] A werebat tries to hit YOU, but misses!
[Sun Dec 04 09:57:25 2011] A werebat tries to hit YOU, but misses!
[Sun Dec 04 09:57:25 2011] A werebat tries to hit YOU, but misses!
[Sun Dec 04 09:57:27 2011] A werebat kicks YOU for 12 points of damage.
[Sun Dec 04 09:57:28 2011] A werebat tries to hit YOU, but YOU parry!
[Sun Dec 04 09:57:28 2011] A werebat hits YOU for 14 points of damage.
[Sun Dec 04 09:57:31 2011] A werebat hits YOU for 56 points of damage.
[Sun Dec 04 09:57:31 2011] A werebat tries to hit YOU, but misses!
[Sun Dec 04 09:57:33 2011] A werebat hits YOU for 56 points of damage.
[Sun Dec 04 09:57:35 2011] A werebat tries to bash YOU, but misses!
[Sun Dec 04 09:57:36 2011] A werebat hits YOU for 36 points of damage.
[Sun Dec 04 09:57:39 2011] A werebat hits YOU for 53 points of damage.
[Sun Dec 04 09:57:42 2011] A werebat tries to hit YOU, but misses!
[Sun Dec 04 09:57:42 2011] A werebat hits YOU for 56 points of damage.
[Sun Dec 04 09:57:43 2011] A werebat bashes YOU for 5 points of damage.
[Sun Dec 04 09:57:45 2011] A werebat tries to hit YOU, but misses!
[Sun Dec 04 09:57:48 2011] A werebat hits YOU for 12 points of damage.
[Sun Dec 04 09:57:50 2011] A werebat hits YOU for 4 points of damage.
[Sun Dec 04 09:57:51 2011] A werebat hits YOU for 14 points of damage.
[Sun Dec 04 09:57:51 2011] A werebat hits YOU for 12 points of damage.
[Sun Dec 04 09:57:51 2011] A werebat kicks YOU for 11 points of damage.
[Sun Dec 04 09:57:54 2011] A werebat hits YOU for 20 points of damage.
[Sun Dec 04 09:57:54 2011] A werebat hits YOU for 31 points of damage.
[Sun Dec 04 09:57:56 2011] A werebat hits YOU for 28 points of damage.
[Sun Dec 04 09:57:59 2011] A werebat kicks YOU for 12 points of damage.
[Sun Dec 04 09:58:16 2011] You have slain a werebat!

So i'm just eyeballing it but that looks like an average hit of 9 (with 0/13 max hits) for the carrion ghoul vs an average hit of 40 (with 5/15 max hits) for the werebat. Which is just insane considering there is probably a 5-6 level difference between these mobs. Is this really how it worked in classic? I'm starting to see why no one wears the Cobalt armor and stacks HP instead.